jQuery Select Toggle is a jQuery plugin which enables secondary items to be toggled based on a form inputs value.
<select id="post-status" name="status" data-toggles="2:#schedule-input">
<option value="1">Published</option>
<option value="2">Scheduled</option>
<option value="3">Draft</option>
</select>
<div id="schedule-input" hidden>
<label for="post-publish-at">
Schedule
</label>
<input type="date" id="post-publish-at" name="publish_at" value="2015-05-01" min="2015-11-08">
</div>